- bin2hex: documentation ( source)
- base64_encode: documentation ( source)
- strrev: documentation ( source)
<?php
//$secret = "3d3d516343746d4d6d6c315669563362";
$secret = "TEST";
//echo $s2 = base64_decode($secret);
//echo $s3 = strrev($s2);
//echo hex2bin($s3);
echo "----------";
echo bin2hex(strrev(base64_encode("TEST")));